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(11) | EP 2 568 562 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Direct current link circuit |
| (57) A device for converting power from a floating source of DC power to a dual direct
current (DC) output, the device includes: positive and negative input terminals connectible
to the floating source of DC power; and positive and negative, and ground output terminals
connectible to the dual DC output that may feed an inverter. The inverter may be either
a two or three level inverter. A charge storage device may be connected in parallel
to, and charged from, the positive and negative input terminals. A resonant circuit
may be also connected between the charge storage device and the dual DC output. The
resonant circuit may include an inductor connected in series with a capacitor. The
charge storage device may discharge through the resonant circuit by switching through
to either the negative output terminal or the positive output terminal.
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